Chao Ma, Lu Shen, Shudong Yang, Zhiang Li, Yao Cheng, Lingyu Zhao, Xiaoqian Guo
{"title":"轧制纯钛板预变形后拉伸载荷下的力学行为及变形机理","authors":"Chao Ma, Lu Shen, Shudong Yang, Zhiang Li, Yao Cheng, Lingyu Zhao, Xiaoqian Guo","doi":"10.1016/j.jallcom.2025.182497","DOIUrl":null,"url":null,"abstract":"Introducing dislocations and {10-12} extension twins through pre-deformation (compression and tension), the mechanical behavior and deformation mechanisms of the rolled commercially pure titanium (CP-Ti) sheet under subsequent tensile loading is comprehensively investigated by means of macroscopic mechanical testing, microstructural characterization, and crystal plasticity simulation. The pre-deformation enhances obviously the yield stress, while weakens the strain hardening behavior during subsequent tension. The relative activity of prismatic slip is reduced after pre-deformation, but more basal slip and extension twinning get activated. Especially, the prismatic slip is more easily activated after pre-compression compared to pre-tension, whereas pre-tension is more favorable to activate extension twinning. Twinning and detwinning behaviors are the key factors in contributing to the changes in mechanical behavior and texture evolution during subsequent tension of CP-Ti. After strain path change, three primary twinning behaviors are observed. In pre-tension samples, nucleation of {10-12}<span><math><mspace is=\"true\" width=\"1em\"></mspace></math></span>extension twin, detwinning of {11-22} contraction twin, and formation of {11-22}-{10-12} secondary twin are discovered. However, pre-compression samples activate the nucleation of {10-12} extension twin, detwinning of {10-12} extension twin, and formation of {10-12}-{11-22} secondary twin. The higher density of pre-twins and pre-dislocations leads to more obvious detwinning behavior.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1 1","pages":""},"PeriodicalIF":6.3000,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Mechanical behavior and deformation mechanisms of rolled commercially pure titanium sheet under tensile loading after pre-deformation\",\"authors\":\"Chao Ma, Lu Shen, Shudong Yang, Zhiang Li, Yao Cheng, Lingyu Zhao, Xiaoqian Guo\",\"doi\":\"10.1016/j.jallcom.2025.182497\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Introducing dislocations and {10-12} extension twins through pre-deformation (compression and tension), the mechanical behavior and deformation mechanisms of the rolled commercially pure titanium (CP-Ti) sheet under subsequent tensile loading is comprehensively investigated by means of macroscopic mechanical testing, microstructural characterization, and crystal plasticity simulation. The pre-deformation enhances obviously the yield stress, while weakens the strain hardening behavior during subsequent tension. The relative activity of prismatic slip is reduced after pre-deformation, but more basal slip and extension twinning get activated. Especially, the prismatic slip is more easily activated after pre-compression compared to pre-tension, whereas pre-tension is more favorable to activate extension twinning. Twinning and detwinning behaviors are the key factors in contributing to the changes in mechanical behavior and texture evolution during subsequent tension of CP-Ti. After strain path change, three primary twinning behaviors are observed. In pre-tension samples, nucleation of {10-12}<span><math><mspace is=\\\"true\\\" width=\\\"1em\\\"></mspace></math></span>extension twin, detwinning of {11-22} contraction twin, and formation of {11-22}-{10-12} secondary twin are discovered. However, pre-compression samples activate the nucleation of {10-12} extension twin, detwinning of {10-12} extension twin, and formation of {10-12}-{11-22} secondary twin. The higher density of pre-twins and pre-dislocations leads to more obvious detwinning behavior.\",\"PeriodicalId\":344,\"journal\":{\"name\":\"Journal of Alloys and Compounds\",\"volume\":\"1 1\",\"pages\":\"\"},\"PeriodicalIF\":6.3000,\"publicationDate\":\"2025-07-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Alloys and Compounds\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1016/j.jallcom.2025.182497\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Alloys and Compounds","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.jallcom.2025.182497","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Mechanical behavior and deformation mechanisms of rolled commercially pure titanium sheet under tensile loading after pre-deformation
Introducing dislocations and {10-12} extension twins through pre-deformation (compression and tension), the mechanical behavior and deformation mechanisms of the rolled commercially pure titanium (CP-Ti) sheet under subsequent tensile loading is comprehensively investigated by means of macroscopic mechanical testing, microstructural characterization, and crystal plasticity simulation. The pre-deformation enhances obviously the yield stress, while weakens the strain hardening behavior during subsequent tension. The relative activity of prismatic slip is reduced after pre-deformation, but more basal slip and extension twinning get activated. Especially, the prismatic slip is more easily activated after pre-compression compared to pre-tension, whereas pre-tension is more favorable to activate extension twinning. Twinning and detwinning behaviors are the key factors in contributing to the changes in mechanical behavior and texture evolution during subsequent tension of CP-Ti. After strain path change, three primary twinning behaviors are observed. In pre-tension samples, nucleation of {10-12}extension twin, detwinning of {11-22} contraction twin, and formation of {11-22}-{10-12} secondary twin are discovered. However, pre-compression samples activate the nucleation of {10-12} extension twin, detwinning of {10-12} extension twin, and formation of {10-12}-{11-22} secondary twin. The higher density of pre-twins and pre-dislocations leads to more obvious detwinning behavior.
期刊介绍:
The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.